Added the json file with best hyperparameter configurations.
Added the json file with best hyperparameter configurations.

PiperOrigin-RevId: 312265630

google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research